
<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>
  <script>
var IsSuppt_onpropertychange='onpropertychange' in document.createElement('input');
var IsSuppt_oninput='oninput' in document.createElement('input');
console.log('IsSuppt_onpropertychange: '+IsSuppt_onpropertychange+";IsSuppt_oninput:"+IsSuppt_oninput);
alert('IsSuppt_onpropertychange: '+IsSuppt_onpropertychange+";  IsSuppt_oninput:"+IsSuppt_oninput);
//document.getElementById('lab1').value="IsSuppt_onpropertychange: "+IsSuppt_onpropertychange+";  IsSuppt_oninput: "+IsSuppt_oninput;
  </script>

</body>
</html>